Soap spots. Wash 'em again.
The Big Bang Theory Season 5, Episode 16
That was not 15th-century SOAP.
The Big Bang Theory Season 2, Episode 2
I suppose we could
turn it into SOAP.
The Big Bang Theory Season 11, Episode 11
I love how your hair
is always on the SOAP.
The Big Bang Theory Season 8, Episode 9
"Number of days without
Amy's hair on the SOAP."
The Big Bang Theory Season 10, Episode 5